The answer is A: Mass extinction.
"Abrupt disappearance of many land and marine species" = extinction of many species.
Meiosis I just learned about this and believe
A polymer is made up of monomers. A monomer is a unit that occurs in repetitive chains. Lipids do not occur in repetitive chains, so they are not classified as monomers. Since they're not monomers, they can't make up polymers, either.
